Examine source code of ancient01

{
  "theme": {
    "images": {
      "theme_frame": "firefox03.jpg"
    },
    "colors": {
      "frame": "#dbb29b",
      "tab_background_text": "#d6cfe3"
    }
  },
  "version": "2.0",
  "name": "ancient01",
  "manifest_version": 2,
  "description": "The Ancient of Days by William Blake takes the measurements of planets, while creating the Universe."
}